– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 pm Mon 28 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Mon 28 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryHeavy rain (total 43mm), heaviest during Tue morning. Very mild (max 14°C on Mon afternoon, min 8°C on Tue night). Wind will be generally light. | Days 5–7 Weather SummaryLight rain (total 4mm), mostly falling on Fri morning. Warm (max 20°C on Sun morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||
Mon 28 | Tuesday 29 | Wednesday 30 | Thursday 1 | Friday 2 | Saturday 3 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  |  |  | | |  | | |  |  | | | |
cloudy | heavy rain | heavy rain | mod. rain | rain shwrs | some clouds | rain shwrs | some clouds | some clouds | cloudy | light rain | rain shwrs | rain shwrs | clear | clear | clear | clear | |
Cloud base (m) | 2350 | 700 | 550 | 550 | 5850 | 800 | 900 | 3150 | 2900 | 2500 | 700 | 650 | 800 | 8850 | 9600 | 9600 | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | 14 | 21 | 8 | 0.1 | — | 0.1 | — | — | — | 2 | 2 | 0.5 | — | — | — | — |
max °C | 14 | 12 | 11 | 12 | 10 | 11 | 13 | 11 | 14 | 15 | 12 | 12 | 13 | 12 | 17 | 19 | 15 |
min °C | 13 | 10 | 11 | 12 | 8 | 8 | 13 | 11 | 10 | 14 | 11 | 11 | 13 | 11 | 11 | 19 | 15 |
chill °C | 13 | 8 | 11 | 12 | 8 | 8 | 13 | 11 | 10 | 14 | 11 | 11 | 13 | 11 | 11 | 19 | 15 |
Freezing level m | 2550 | 3100 | 2750 | 2600 | 2350 | 2250 | 2650 | 2250 | 2650 | 2900 | 2750 | 2600 | 2900 | 3500 | 3700 | 3950 | 4000 |
 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:09 | — | — |
 | 6:52 | — | — | 6:51 | — | — | 6:49 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 43mm), heaviest during Tue morning. Very mild (max 14°C on Mon afternoon, min 8°C on Tue night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Light rain (total 4mm), mostly falling on Fri morning. Warm (max 20°C on Sun morning, min 11°C on Thu night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.